Building structure



FIG. 1 is a perspective view of a building structure;

FIG. 2 is a top plan view thereof;

FIG. 3 is a front elevational view thereof

FIG. 4 is a back elevational view thereof;

FIG. 5 is a right elevational view thereof, a left elevational view being a mirror image thereof; and,

FIG. 6 is a bottom plan view thereof.

The broken lines showing environment in the drawings are included for illustrative purposes only and form no part of the claimed design. 

CLAIM The ornamental design for a building structure, as shown and described. 